The horizontal impact (rotor) sprinkler was invented in 1933 by citrus farmer Orton Englehardt. He later sold his patent to Clem and Mary LaFetra who then marketed it under the brand name Rain Bird. So what today is commonly known as a "rainbird" sprinkler is in actuality not its own type of sprinkler, but simply an accepted name for an impact rotor sprinkler.
Rainbird sprinklers are known for their horizontal action and up to 360 degree spin. The body (or just the nozzle) of the sprinkler is moved in circles as it propels water by an arm that consistently impacts the sprinkler body. Most of today's impact sprinklers are gear-driven, meaning that only the nozzle moves by way of a spring-loaded arm that is pushed back by the water stream, thus turning the gears (and sprinkler) before springing back to hit the water stream once more in an ongoing cycle.
Underground Sprinkler / Rainbird / Sprinkler Timer / Rotor Sprinkler / Hose Timer / Sunlight Sensor / Moisture Sensor
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